What is it about?

This paper models the relationship between the splitting tensile and compressive strengths of sandstone aggregate sub-base samples of marginal quality stabilised with combinations of Portland composite cement (PCC) and styrene-butadiene (SB) latex copolymer (TP). All samples were subjected to 7 days of dry curing before undergoing the splitting and unconfined compression tests.

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Why is it important?

Researchers and practitioners can use the models in this paper to determine the corresponding splitting tensile strengths by using measured values of unconfined compressive strengths without conducting indirect tensile tests and vice versa. This approach reduces the cost and time of laboratory testing.

Perspectives

Stabilisation with PCC, TP and TP-PCC, all within their optimum working conditions, increased the ITS and UCS of the local marginal sandstone aggregate. Stabilisation with PCC (PCC content: 3% – 5%) provided the highest ITS and UCS and the ITS-UCS relationship was linear (R2 = 0.98) with a slope of 8.3%. Stabilisation with TP+PCC (TP+PCC contents: 0.75%+2%, 0.75%+3% and 0.75%+5%) provided the second highest ITS and UCS and the ITS-UCS relationship was linear (R2 = 0.997) with a slope of 10.6%. The slight reductions in ITS and UCS were due to the adverse impact of the SB particles on the hydration reaction of cement particles. Stabilisation with TP (TP content: 0.5% – 2%) provided the least ITS and UCS and the ITS-UCS relationship was a negative 2nd-degree polynomial (R2 = 0.98).

Dr Elsaid Mamdouh Mahmoud Zahran
University of Nottingham Ningbo China

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This page is a summary of: An investigation into the relationship between strength properties of sandstone aggregate stabilised with cement and polymer emulsion for road sub-base applications, January 2023, American Institute of Physics,
DOI: 10.1063/5.0110703.
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